Covering for pipes and surfaces in ice-machines



(No Model.)

O. F. SMITH. GOVERiNG FOR PIPES AND SURFACES I N ICE MACHINES, &0. No. 345,549.- Patented July 13, 1886.

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CHARLES F; SMITH, OF FITCHBURG, MASSACHUSETTS.

COVERING FOR PIPES AND SURFACES IN ICE-MACHINES, 840.

fiPECIE'ICATION forming part of Letters Patent No. 345,549, dated July 13, 1886.- Application filed March 15, i886. Serial No. 195,268. (No model.)

To all whom it may concern:

Be it known that I, CHARLES F. SMITH, of Fitchburg, Worcester county, Massachusetts, have invented a new and Improved Means for Preventing the Formation of Frost on Pipes in Ice-Making Machinery; and I hereby declare the following to be a full, clear, and exact description of the same, reference being had to the accompanying drawing, making part of this specification, in which the figure illustrates a pipe to which my improved covering has been applied.

It is well known that the formation of frost on pipes in ice-making machinery to a very great degree impairs the capacity of such pipes, and the inclosed refrigerating material for the absorption of calorie, and any means for the prevention of the formation of frost will en- 'hance the working capacity of ice-making madescribe the manner in which I have carried it out.

I take the pipes or coils already prepared or set up, or in single lengths, and heat them to a moderate degree, whereupon I plunge the said coils, pipes, or fittings into a bath of a mixture of the low distillate of petroleum,

percentage of salt may be addedto this bath,

in the judgment of those practicing the invention. When the heated pipes, coils, orfittings are plunged into the bath, as described, and withdrawn, they remain covered with a thin coating of the mixture, which will closely adhere to the surface and permanently remain thereon. This coating prevents the moisture from reaching the metal of the pipes, coils, or fittings, and also acts in the matter as a moisture or water repellant, so that the moisture will not be deposited to enable the formation of frost.

in the drawing, A is a pipe, and B the coatlng.

I am aware that glycerine has heretofore been used to coat pipes in ice-machines to pre' vent the formation of frost, and I therefore lay no claim theretoflout Having thus described my invention, what I claim as new, and desire to secure by Letters Patent,-is

In ice-making machinery, pipe or other surfaces covered with a composition of equal parts of petrolina and glycerine, with or without salt, to prevent the formation of frost, substantially as set forth.

CHARLES F. SM 1TH, 

